Perhaps you should try some spelling variations:
thi hanh » thi thanh
nam thuc » nam thuoc, am thuc, nam thu
ve triet » va trien, su triet
tu sach » thu sach, su sach, tu cach
te sach » toc sach
hanh xa » hanh va, hanh ma, hanh xu
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
va tinh » may tinh
tinh la » tinh lao, tinh lai, tinh va
ve nam » he nam, va nam, le nam
la ve » ly ve, ca ve, va ve

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) OR (te sach)) thi hanh xa hoi. hieu ve nam thuc va tinh la ve triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) thi hanh xa hoi. hieu ve nam thuc va tinh la ve triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) thi hanh xa hoi. hieu ve nam thuc va tinh la ve triet*.